Improved method of making ooees foe pipe casting



@einen gisten a'trnt @frn WIILIQIIII E. BIRD, WEST BRIDGrEITA'IER, MASSACHUSETTS. letters Patent No. 68,033, ciatedlAagust 27, 1867.

I IMIROYED METHOD 0F MAKING GOBES FOR PIPE CASTING.

Be it kno-wn that I, WILLIAM E. BIRD, of West Bridgewater, in the county of'Plymouth, and State of Massachusetts, have invented certain new and4 useful improvements in Machines for Making Cores; and I do hereby declarethat the following isafull and exact Vdescription thereof, reference being had to the accompanying drawings, and to the letters of reference being marked thereon.

The nature of my invention consists in making a simple machine into which I can puta core-spindle, and by means of a platform, which forms a part of this machine, I c an spread the sand from which the core is to be made evenly and rapidly over the cylindrical surface of the spindle. I

To enable othersskilled in the art to make and use my invention, I will proceed to` describe its construction and use. In the drawings- 4 .Figure 1 is an isometric view of the entire machine, showing the core-spindle in'position.

.Figure 2 is a plan of the same. i

Figure 3 is a side elevation of the same. 4

Figure 4 is a longitudinal-vertical section of thc'sam'e.

Figure 5 is a sideelevation of a machine so modiiied that the part holding' the boxes in which the core-` spindle hangs slides so asV to carry the lcore-spindle over the platform. i

- To construct myA improved machine for making cores I irst make a suitable frame, A, in general form as represented in the drawings. B B are two standards attached to this frame. M M are slide-bars which in combination with the standards B B, form slides or ways upon which thejournal-boxes C C slide. The journalboxes C C are raisedcr lowered by means of the screws H H', which are attached to thejournal-boxes'C C', and work through femalescrews cut inthe pieces O O.v The screws H H are' operatedby.thecrank-handleJJ. The journal-boxes C C serve to-hold the core-spindle by means of journals made upon. the ends ofthe spindle for that purpose. Fis a platen or table which slides upon the rolls E E E E immediately'nndcr the core-spindle. The platen F is connected to the core-spindleD by means of a chain, R R, gs. 1, 2, and 4, so thatthe motion of the platen will always coincide with the motion of 'the' core-spindle. The platen F may be smooth., or may be ornamented so as to impress any desired 'figure upon the surface ofv the core. L L are standards attached to the frame A, in which the striker K slides. The striker K may be raised er loweredlby means of similar deviceA of that used for raising and lowering the journal-boxes, or may be held in position by set-screws. l

To use my machineI proceed as follows: The platen F is run out as represented by the dotted lines in iig. 3, so that it extends beyond the striker K a distance equal to the circumference ofthe core-spindle upon-which I ivishv to construct the core. The striker K is adjusted so that its lower edge shalll be at the desired height above the platenF.- The platen F is now covered with core-sand and made to passl under the core-spindle D. This action presses the core-sand against the core-spindle and causes it to adhere to the surface, thus .completing the core. .As the platen F always traverses in a precise relation to the core-spindle D, y(since they are connected by the chain 3.,) it is very easy to gauge the length of the bed of sand uponthe platen F, so that its llength shall be just suicient to pass 'around the core-spindle D. For this purpose stops may be placed upon the platen. In iig.' 5I have shown a modification of my machine, that is, the platen F remains stationary while the frame B O, carrying with it thejournahboxes C C', and, of course, the core-spindle D, slides-longitudinally on the lower frame A, thus rolling the core-spindle over the surface of the platen, instead of sliding the platea under the core-spindle, as iirst describedf- I i The advantages that I claim for .my improved machine for making yc'or'es are as follows.: The core can be made with great rapidity and accuracy. Cores cau be rapidly made with embossed surfaces, se as to give any desired impressions upon the inside of the castings., that of a female screw, for instance.

What I claim as my invention, and desire 4to secure by Letters Patent, is-

1. -The method. of forming asand-core by making on a platen a sheet of core material of the desired shape4 and size, and then transfcrringit to the core-spindle by causing the said spindle to roll over said sheet ofcore material, substantially as described and for the purposeset forth. V l

2. The combination and arrangement of the platen with'the adjustable revolving core-spindle and chain, or its mechanical equivalent, made substantially as describedand for the purposes set forth.

3. The platen F, in combination with the striker K, made substantially as described and f'or thc'purpose set forth.

WM. E. BIRD.

Witnesses:`

F. G. PARKER. A. HUN BERRY. 

